Tube with throttle insert

Abstract

The tube ( 1 ) includes a connector ( 9 ) with a dispensing duct ( 13 ) which connects a dispensing opening ( 11 ) to a reservoir ( 3 ). For the dosed dispensing of a liquid from the reservoir ( 3 ) through the dispensing opening ( 11 ), a throttle insert ( 31 ) is inserted into a distal section ( 9 b ) of the connector ( 9 ) and is connected in form-fitting fashion to the connector ( 9 ). The connection of the throttle insert ( 31 ) to the connector ( 9 ) is preferably realized by a radial pressing action. The throttle insert ( 31 ) is preferably of dome-like form and delimits at least one primary throttle duct ( 47 ) which forms in the dispensing duct a constriction which limits the volume flow of the liquid from the reservoir ( 3 ) to the dispensing opening ( 11 ).

The invention claimed is: 
     
       1. A throttle insert ( 31 ) for use in a tube ( 1 ), comprising: a dome-shaped body of revolution with an outer shell surface ( 33 ) and with an abutment ring ( 39 ), the shell surface ( 33 ) extends from a distal outer edge ( 35 ) with a maximum diameter (D 3   a ) to a proximal outer edge ( 37 ) with a relatively smaller outer diameter (D 3   b ), the abutment ring ( 39 ) adjoins the distal outer edge ( 35 ) at a face side, a channel-shaped recess as a delimitation for a primary throttle duct ( 47 ) is recessed in the shell surface ( 33 ), and said channel-shaped recess extends from a mouth in the abutment ring ( 39 ) to a mouth in the shell surface ( 33 ). 
     
     
       2. The throttle insert ( 31 ) according to  claim 1 , wherein the body of revolution has, adjoining an inner edge of the abutment ring ( 39 ), a ring-shaped cavity ( 41 ) which is delimited at a face side by a base plate ( 43 ) and at an inside by an installation pin ( 45 ) which projects in a distal direction from the base plate ( 43 ). 
     
     
       3. The throttle insert ( 31 ) according to  claim 1 , wherein the body of revolution comprises a face-side top section ( 50 ) with a peripheral contact ring ( 49 ) adjoining the proximal outer edge ( 37 ), the top section ( 50 ) is disk-shaped or has a pan-shaped depression ( 53 ), and at least one channel as a delimitation of a secondary throttle duct ( 51 ) is recessed in the contact ring ( 49 ). 
     
     
       4. A tube ( 1 ), comprising a reservoir ( 3 ) for a fluid medium, a connector ( 9 ) with a dispensing duct ( 13 ) which connects a dispensing opening ( 11 ) to the reservoir ( 3 ), the dispensing opening ( 11 ) is arranged at a proximal section ( 9   a ) of the connector ( 9 ), and a distal section ( 9   b ) of the connector ( 9 ) is connected via a tube shoulder to a tube shell ( 5 ) which encloses the reservoir ( 3 ), a throttle insert ( 31 ) arranged in the dispensing opening ( 13 ) so as to form in the dispensing opening ( 13 ) a constriction which closes off the dispensing opening ( 13 ) aside from at least one primary throttle duct ( 47 ) in the throttle insert, the throttle insert ( 31 ) is dome-shaped and includes an outer shell surface ( 33 ) and a face-side abutment ring ( 39 ) that meet at a distal outer edge ( 35 ), and the throttle insert ( 31 ) is fastened with a form-fit in the connector ( 9 ) by the face-side abutment ring ( 39 ) which forms an undercut with a ring-shaped step ( 17   a ) on an inner wall of the connector ( 9 ). 
     
     
       5. The tube ( 1 ) according to  claim 1 , wherein the ring-shaped step ( 17   a ) is a distal end section of a ring-shaped recess ( 17 ) on the inner wall of the connector ( 9 ). 
     
     
       6. The tube ( 1 ) according to  claim 1 , wherein the connector ( 9 ) and the throttle insert ( 31 ) are manufactured from different plastics, and a material of the throttle insert ( 31 ) is harder than a material of the connector ( 9 ). 
     
     
       7. The tube ( 1 ) according to  claim 1 , wherein the outer shell surface ( 33 ) of the throttle insert ( 31 ) extends from the distal outer edge ( 35 ) to a proximal outer edge ( 37 ), and a diameter (D 3   a ) at the distal outer edge ( 35 ) is greater than a diameter (D 3   b ) at the proximal outer edge ( 37 ), a distal section, adjoining the distal outer edge ( 35 ) of the throttle insert ( 31 ), of the shell surface ( 33 ) bears in sealing fashion against the inner wall of the connector ( 9 ), and a proximal section, adjoining the proximal outer edge ( 37 ), of the shell surface ( 33 ) is arranged radially spaced apart from the inner wall of the connector ( 9 ), such that said inner wall and the proximal section of the shell surface ( 33 ) delimit an interposed ring-shaped chamber ( 19 ). 
     
     
       8. A method for producing a tube ( 1 ) according to  claim 1 , comprising pushing the throttle insert ( 31 ) into the interior of the connector ( 9 ) from the distal side as far as a certain axial position and pressing the throttle insert together radially with the connector ( 9 ), and plastically deforming a material of the connector ( 9 ) adjacent to the throttle insert ( 31 ), creating an axial undercut of the connector ( 9 ) by the throttle insert ( 31 ). 
     
     
       9. The tube ( 1 ) according to  claim 1 , characterized in that the primary throttle duct ( 47 ) is delimited by a channel-shaped recess on the outer shell surface ( 33 ) of the throttle insert ( 31 ) and by the inner wall of the connector ( 9 ), and the primary throttle duct ( 47 ) has a first mouth at the face-side abutment ring ( 39 ) and has a second mouth in the shell surface ( 33 ). 
     
     
       10. The tube ( 1 ) according to  claim 9 , wherein the throttle insert ( 31 ) comprises a face-side top section ( 50 ) with a central region and with a peripheral contact ring ( 49 ) projecting axially thereon, and, for the connection of the ring-shaped chamber ( 19 ) to a dispensing chamber ( 55 ) which is connected to the dispensing opening ( 11 ), at least one of:
 a) the contact ring ( 49 ) is arranged with a spacing (S 1 ) to an adjacent abutment surface of the proximal section ( 9   a ) of the connector ( 9 ), or 
 b) the contact ring ( 49 ) comprises at least one secondary throttle duct ( 51 ).